$7)$A board that is $20\mathrm{.}0$ cm wide, $5\mathrm{.}00$ cm thick, and $3\mathrm{.}00$ m long has a density $400$ kg$/$m$3.$ The $7)$

board is floating partially submerged in water of density $1000$ kg$/$m$3.$ What fraction of the volume of the board is above the surface of the water?

A$)$ zero

B$)0\mathrm{.}200$

C$)0\mathrm{.}400$

D$)0\mathrm{.}600$

E$)$ The answer depends on which edge of the board is vertical.